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I know that the SCT SF3 has an tune option for CMCV delete just click the option and your done. To tune for CMCV delete you obviously have to tunr off the motor and the timing needs to be advanced a couple degrees down low and at idle.
Now how about it not shutting off when i turn the key off any help there
When you say the car won't turn off, do you mean the engine stays running even when you pull out the key and the ignition switch is in the off position?
I have no idea if your tune has any bearing on this,
If it is just he electronics (lights, radio, etc.) that stays on, and your tune is the culprit, you should return to stock and contact your tuner.
Again, this is only my guess. I have absolutely no idea if a tune can even mess with the radio, ignition switch and all.